The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
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On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
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It has been scientifically proven that stroking a cat can lower one's blood pressure!
456
Fingers prune underwater not because of them absorbing the water or washing away the oil, but because of an evolutionary trait caused by the brain to enhance the grip of your fingers underwater.
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After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
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The adult human brain weighs about 3 pounds (1,300-1,400 g).
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Early American humans hunted car-size armadillos and used their shells for houses.
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